Continuous Delivery (CD) is the ability to get code changes reliably to production environments. This practice should be automated and should enable developers to provide value to consumers efficiently.

In this exercise, you will use ArgoCD to automate the delivery of techtrends application to a Kubernetes cluster.

Prepare the environment to create your delivery pipeline.

Note: Make sure to have VirtualBox installed. Make sure task list completed https://github.com/truongnhatbui/techtrends/wiki/Step-3-Deploy-Kubernetes-Cluster

Now that you have a Kubernetes cluster up and running, let's deploy techtrends application using ArgoCD.

The following snippet highlights the commands to deploy ArgoCD and expose it using a NodePort service:

# deploy ArgoCD
kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

# Create the NodePort service for ArgoCD server by using the 
# `kubectl apply -f argocd-server-nodeport.yaml` command
apiVersion: v1
kind: Service
metadata:
  annotations:
  labels:
    app.kubernetes.io/component: server
    app.kubernetes.io/name: argocd-server
    app.kubernetes.io/part-of: argocd
  name: argocd-server-nodeport
  namespace: argocd
spec:
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 8080
    nodePort: 30007
  - name: https
    port: 443
    protocol: TCP
    targetPort: 8080
    nodePort: 30008
  selector:
    app.kubernetes.io/name: argocd-server
  type: NodePort

The Nodeport service for ArgoCD can be found in the techtrends repository.

The initial password for the admin account is auto-generated and stored as clear text in the field password in a secret named argocd-initial-admin-secret in your Argo CD installation namespace. You can simply retrieve this password using kubectl:

kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d

For better readability, e.g. if you want to copy & paste the generated password, you can simply append && echo to above command, which will add a newline to the output.

Warning - You should delete the argocd-initial-admin-secret from the Argo CD namespace once you changed the password. The secret serves no other purpose than to store the initially generated password in clear and can safely be deleted at any time. It will be re-created on demand by Argo CD if a new admin password must be re-generated.

Using the username admin and the password from above, login to Argo CD's IP or hostname:

argocd login <ARGOCD_SERVER>

Change the password using the command:

argocd account update-password

Once logged in to the ArgoCD server, applications can be created. The declarative manifest for techtrends Application CRD can be found below:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: techtrends
  namespace: argocd
spec:
  destination:
    namespace: default
    server: https://kubernetes.default.svc
  project: default
  source:
    path: manifests 
    repoURL: https://github.com/truongnhatbui/techtrends
    targetRevision: HEAD
  # Sync policy
  syncPolicy: {}